Yesterday, I was poking around a small bush of white flowers looking for insects to photograph. I noticed this butterfly hanging from the bottom of a flower, rather than sitting on top:
I panned around to underneath the flower and found out why:
The butterfly had been snared by an ambush bug (Phymatinae), which is a subgroup of assassin bugs (Reduviidae). I think the above animal is a nymph belonging to the genus Phymata. These bugs hang out underneath flower petals until unweary pollinators visit. They then lunge out and snare their prey with their enlarged raptorial appendages, piercing the exoskeleton with a syringe like rostrum.
Here is an adult of the same, or a similar, species. About one of every three flowers in this bush had an ambush bug laying in wait below.
If any insect-gurus can identify this exact species, it would be much appreciated.